Question

complete the steps in solving the quadratic function 7x-9=7x^2-49x by completing the square

Answer 1

7x-9=7x^2-49x

-7x              -7x

-9=7x^2-56x

-9=7(x^2-8x+c)-7(c)

c=(-8/2)^2=(-4)^2=16

-9=7(x^2-8x+16)-7(16)

+112                    +112

103=7(x-4)^2

/7     /7

103/7=(x-4)^2

sqrt      sqrt

+/-$\sqrt{14.714}$=x-4

+4              +4

x=$\sqrt{14.714}$+4=3.836+4=7.836

x=4-$\sqrt{14.714}$=4-3.836=0.164

Answer:

x=7.836, x=0.164

Answer 2

Answer:

1) 56

2) 112

3) 16

Step-by-step explanation:

on edgenuity 2020 :))